What is the ruling on preventing a child from going to the nearby mosque to perform Asr prayer because he delays and does not return until after Isha prayer?

It is not permissible for a father to prevent his son from performing congregational prayers, as they are obligatory. The questioner's statement is not an excuse for prevention, as the father can permit his son to pray and then prevent him from staying out late after the prayer. The son is advised to obey his father by returning home after prayer, unless there is a more pressing obligation, and to be a good role model. The father is advised not to object to his son's delay if it is for a lesson or a lecture.